Comeprative Evaluation Of Two Noninvasive Lateral Gingival Displacement; An In Vivo Study

Abstract

Aim &Objective: To analyse the efficacy of retraction cord with a haemostatic agent in comparison with retraction paste on lateral gingival displacement, to achieve the success of fixed dental prostheses (FDP).

Material and Methods: Test samples included 15 teeth 30 samples that required treatment with metal-porcelain FDP. Impressions were taken with the help of special tray after the gingival retraction procedure and after 7 days with retraction paste application.. The impression was made using vinyl polysiloxane impression material. Lateral gingival displacement width was measured on vision inspection system (Sipcon Measuring Systems, India, Model No. AVI-IMG-3D). Images of the impressions were captured under high resolution and analyzed with specialized software to determine linear gingival changes with micrometer accuracy along the horizontal/lateral axes.

Results: The mean value of group A after gingival retraction was 0.435 mm, and with retraction paste .306 in mesiobuccal region. The mean value of group B after gingival retraction with cord was 0.555 mm, and after gingival retraction with paste was 0.404 mm in mesiolingualresion. . The mean value of group c after gingival retraction with cord was 0.511mm, and after gingival retraction with paste was 0.329 mm in distobuccalresion. The mean value of group D after gingival retraction with cord was 0.587 mm, and after gingival retraction with paste was 0.418 mm in distolingual resion. Lateral gingival displacement width between a combination of cord retraction and hemostatic agent group in comparison with the retraction paste group showed a significant difference (p<0.001).

Conclusion: Gingival displacement width as a result of cord retraction with the hemostatic agent was larger compared to the retraction paste. Even though both of them are still considered to be effective in providing access for impression material.